Vania



April l2, 1927.

E. N. STONE scmzan WALL PoR CENTRIFUGAL BASKETS .Filed March 21. 1923 E.Q Q ma E JJJeJaJJJaJJJa l 2 Z .4 Z Z L L i 41 m, 3343343 JJJJJJJ 4l s YM.70. A. AW vfo Patented Apr. l2, 1927.

lrlrtl'lED STATES PATENT FFlCE.

ED'WARD N. STONE, F OGDEN, UTAH, ASSIGNOB OF ONE-HALF TO CRESSON-MORRISCOMPANY, OF PHILADELEH, PENNSYLVANA, A CORPORATION OF FENNSYL- VANIA.

SCREEN VJALL FOR CENTRIFUGAL BASKETS.

Application filed March 21, 1923.

This invention relates to screen walls for centrifugal baskets and itcomprises a metallic ioraminous shcct provided near one end with aplru'ality ot slots and near the other f end with a plurality.' ol'corilespondin` struck out inwardly projecting; lingers which,advantageousy. in turn are provided with struck out taule@r or lipswhereby the sheet may be bent into annnular torni and the ends connectedby lapping the lingered end under the slotted end sith the lineers inthe slots and the struck out lips when used, bent baelfrivard to preventac leutal removal of the tingen? from the slots: all as more fullyhereinafter set forth and as claimed,

The virali of basket eer'rituggals is usually composed ot slotted orperl'orat-ed metal or a vvire mesh material which in use is supported inbash-et eentriifngals at the top and bottoni. ln use this. Wall is thepart most srbiect to Wear and the part needing the most frequent repairor replacen'ient. Usually in plaeingf or replacing the basket wall :iSlat sheet ol' suitable perforated or 'forainiuous metal is lient intoannular vform and the ends ot the sheet riveted. soldered or clampedtogether. Tirs operation requires considerable time. skill and labor.

Among other objects of the present invention is the provision of ascreen Wall which can be cut into standard lengths at the factory andshipped, stored and handled in flat or arcuate lorni and afterpositioning in the centrifugal can have the ends readily secured inlockingengagement with a minimum of time, labor and skill; and theprovision of locking` means tor a screen wall permitting readydisengagement. To this' end l maize a screen wall of suitable length andsize provided at one end with a plurality ol' inwardly pr.o' ieetin;rstamped out lin- C "h linger ou its upper tare having a, slruel; outlang or lip and provided adjacent the other end ol the screen with acorrepondini; number ot transverse slots ol a. width corresponding: tothe lingers. This ronstruetion permits bendingr the sheet into aiuiularl'orin with the end upon which the lingers are struck out underlappingrthe slottei` end with insertion of the lingers in the flo-ts andretention of them therein by means ot the struck-out fangs or lips. Thisconstruction results in engagement strong enough to withstand thel'ieavy stresses and Serial No. 626,582.

strains incident to the use ot' a centrifugal and results in a Wallhaving substantially smooth inn-er surfaces Which presents no sharpedges or angles and Which permits easy and ready scraping by the plow orother instrument used for discharging and removingr the solid materialfrom the screen wall.

The screen wall may be made ot' one standard length ot' metallic screenand in use its ends may be locked by the means described. Or the screenmay be made of a number of tandard sections each united to the adjoiningsections by means of the described tongues and slots. When a wall madeup ot' a plurality of sections is used, one Worn or damaged section maybe replaced with a minimum expenditure of time and labor.

Centrifugal walls under the present invention are u; eful for screens orbaskets ot machines used in the centr-itiigal separation and straining'of material ol any kind, but they are lnuticularlj,Y useful in machinesused for the separation and purilieation olI sugar.

In the accompanying drawings showing; one lorrn ot a spel-illeembodiment olI my invention and in the several views olE which similarreference numerals designate corresponding parts, Fig. l is a Ytace viewol'` the screen before it is bent into annular form; Fig. 2 is an outerface View of the tvvo ends secured together when the sheet lzent intoannular form;

Fig. 8 is an inner tace View of the two ends secured together and Fig, 4is a transverse sectional View on an exaggerated scale on line 45H4 ofFig'. 2.

Referring to the drawings l indicates a sheet of metal suitable. tor usead screen in a centrifugal basket. This sheety is of toraminous materialbut it is here shown plan for simplicity ot' illustration. This, sheetadjacent one end is provided with a series of transverse slots :i andadjacent the other end it is provided with a pluralit.Y ol' lingers 3%.There lingers are made by stand inf.r out the metal in the lorm shown.iVhen the sheet is bent into annular lorin its ends overlap and thelingers 3 are passed through the corresponding slots 2. ln use thestresses to which a machine ot this type is subject are all directedoutward from the center and the tendency of the ends ot the sheet topull away from one another serves to hold the lingers tightly in theslots. Additional means for preventing unintentional or accidentalescape of the lingers from their slots may be provided. Sonic or all ofthe lingers may be provided with sub-lingers or lips 5 formed bystamping the metal as is shown. These lips may be bent outwardly attheir free edges as shown at Fig. 4 so as to provide the inclined face 6and abrupt face T. When a finger 3 is inserted in a slot 2 the lip 5will be depressed by the action of this inclined face (i against theedge of the slot 2 and the linger will freely enter the slot. As soon asit enters however the lip 5 will spring outwardly to its normal positionand in attempting to withdraw the linger 3 from the slot 2 will beprevented by the lengagement of the abrupt face 7 of the lip 5 with theedge of the slot Q. This prevents accidental or unintentionaldisplacement of the parts. Should it be at any time necessary todisengage the rends of the sheet the lips 5 are held in depressedposition while the lingers 3 are withdrawn from the slots 2.

In accordance with the present invention the screen wall may be made ofa number of sections, each section being provided with the locking meansdescribed and being locked to the adjoining section in the mannerpointed out. The lingers of each section engage the slots of the nextadjoining section. lVhen the required number of sections are lockedtogether the entire screen is bent into annular form and the free endsof the end section are locked in the same manner as described in ascreen made of a single section. The screen made of a plurality ofsections has the advantage that one small section may be replaced ifdamaged or worn without the necessity of renewing the entire screen.

What I claim is:-

l. A screen for a centrifugal basket consisting of a sheet of materialadapted to be bent into annular form. said sheet being provided,adjacent one end, with a series of transverseI slots, and beingprovided. adjacent the other end, with a corresponding` series ofinwardly pointing lingers adapted to enter into and be engaged by thetransverse slots and means carried b v said lingers for preventing theiraccidental withdrawal from the said transverse slots.

2. A screen for a centrifugal basket consisting of a sheet of materialadapted to be bent into annular form, said sheet being provided,adjacent one end. with a series of transverse slots, and being provided,adjacent the other end, with a corresponding series of communicatingtransverse and longitudinal slits which form, in the body of the sheet,a series of inwardly pointing lingers adapted to enter into and beengaged Leases? by the transverse slots and means formed in said fingersfor preventing their accidental withdrawal from the said transverseslots.

3. A screen for a centrifugal basket consisting of a sheet of materialadapted to be bent into annular form, said sheet being provided,adjacent one end, with a series of transi erre slots, and beingprovided, adjacent the other end, with a corresponding series ofinwardly pointing fingers adapted to enter into and be engaged by thetransverse slots, said fingers being provided with members projectingfrom the plane surface thereof which permit such entrance but whichresist withdrawal.

et. A screen for a centrifugal basket consisting of a sheet of materialadapted to be bent into annular forni. said sheet being provided,adjacent one end, with a series of transverse slots. and being provided,adjacent the other end, with a corresponding Series of inwardly pointinglingers adapted to enter into and be engaged by the transverse slots,said fingers being provided with members each having an inclined faceand an abrupt face, the inclined face permitting the entrance of thefinger into the slot but the abrupt face resisting withdrawal of thelinger therefrom.

A screen for a centrifugal basket consisting of a sheet of materialadapted to be bent into annular form, said sheet being provided,adjacent one end, with a series of transverse slots, and being provided,adjacent the other end, with a corresponding series of comn'iunicatingtransverse and longitudinal slits which form, in the body 0f the sheet,a series of inwardly pointing lingers adapted to enter into and beengaged by the transverse slots, the lingers being provided withcommunicating transverse and longitudinal slits which form, in the bodyof the lingers, lips which permit entrance of the fingers into the slotsbut which resist withdrawal of the lingers therefrom.

G. A screen for centrifugals comprising a sheet of foraminous materialprovided near one end with a plurality of slots and near the other endwith a plurality of corresponding struck-out. inwardly projectinglingers and the lingers provided with struckout langs. whereby the endsof the sheet may be connected by lapping the fingered end under theslotted end with the lingers in the slots and the struck-out fangs ofthefingers bent backward to prevent accidental removal of the lingers fromthe slot.

In testimony whereof, I have hereunto allixed my signature.

EDWARD N. STONE.

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